/*
 * Copyright 2014 NAVER Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.navercorp.pinpoint.profiler.monitor.codahale.cpu.metric;

import com.codahale.metrics.Gauge;

/**
 * @author hyungil.jeong
 */
public final class EmptyCpuLoadMetricSet extends CpuLoadMetricSet {

    private static final Double UNSUPPORTED_CPU_LOAD_METRIC = -1.0d;
    private static final Gauge<Double> UNSUPPORTED_CPU_LOAD_METRIC_GAUGE = new Gauge<Double>() {
        @Override
        public Double getValue() {
            return UNSUPPORTED_CPU_LOAD_METRIC;
        }
    };

    @Override
    protected Gauge<Double> getJvmCpuLoadGauge() {
        return UNSUPPORTED_CPU_LOAD_METRIC_GAUGE;
    }

    @Override
    protected Gauge<Double> getSystemCpuLoadGauge() {
        return UNSUPPORTED_CPU_LOAD_METRIC_GAUGE;
    }

    @Override
    public String toString() {
        return "Disabled CpuLoadMetricSet";
    }

}
